fs_create_file

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The description mentions auto-creation of parent directories, which is useful behavioral info. However, it omits critical details such as whether it overwrites existing files, permission requirements, or side effects. With no annotations, this is a significant gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is very short (one sentence, 8 words). While concise, it sacrifices necessary detail, making it underspecified rather than optimally compact.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool has 3 parameters, no output schema, and no annotations, the description should provide more context about return values, error handling, path format, and overwrite behavior. The current description is incomplete for effective use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description provides no explanation of the parameters (file_path, content, charset) beyond what is in the schema. With 0% schema description coverage, the description fails to add any semantic value, leaving the agent to infer usage from type/name alone.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action (create a file) and resource (file). It also highlights the auto-creation of parent directories, which distinguishes it from sibling tools like fs_write_text that may not create directories automatically.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies when to use this tool (creating a new file with automatic parent directory creation) but does not provide explicit guidance on when not to use it or how it compares to alternatives like fs_copy_file or fs_write_text.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.